Linux Command Glossary Linux Command Glossary A alias aro at atrm atq awk B b2sum bash batch bg bind break bzgrep bzip2 C case cat cd cksum column cp csplit cssh D date dd df dhcping dict diff dig dir dirs dmesg du dump E egrep eject emacs exec exit expand export F factor file find firewall-cmd flock fmt fold G g++ gcc getenforce gpasswd gpg gpm grep groupadd groupdel groupmod groups gunzip gzip H halt hash head help history host hostname I id ifconfig info init iptables isodump J jobs join K kill killall L last lastlog less let ln locate logger logname logout logrotate look ls lsof lspci M mail mailx make man md5sum mkdir mktemp mount N named netstat newaliases nice nl nohup nslookup O od open P passwd paste perl ping pkill popd portmap ps pushd pv pwd Q quota R rar read reboot rename rev rm rmdir route rpm rsync S scp screen script sed set setenforce seq sftp sh sha256sum sha512sum shred shutdown skill sort sponge ssh stat sudo sum T tac tail tar tcpdump tee time timedatectl timeout top touch tr traceroute trap ts tty U ufw umask umount unalias uname uncompress uniq unrar unexpand unset unlink until uptime useradd userdel usermod users V vdir vi vim vmstat W w wait wall watch wc wget which while who whoami whois write X xargs xdg-open xinetd xz Y yes ypbind ypcat ypinit yppasswd yppoll yppush ypset Z zcat zcmp zdiff zdump zforce zgrep zip zless zmore